Log In. It represents a consensus on what constitutes relevant good practice guidance. This requires national building energy regulations to be based on calculations that integrate the impact of the building envelope and the building services systems, formalising what was already recognised as good design practice. In addition, the use of voluntary energy efficiency and sustainability indicators has increased. Search the knowledge portal Enter keyword. Select Theme.
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A n ew edition of Guide B Heating, Ventilating, Air Conditioning and Refrigeration has been in preparation for some time and is about to be published, replacing the previous version. For more than 75 years, it has evolved in content and form, but always with the objective of providing an overview of guidance to good practice in the selection and design of HVAC systems.
The air conditioning and refrigeration section features a decision tree to help designers select systems. Chapter 3 of the new guide brings together the air conditioning and refrigeration sections.
Previously air conditioning was partnered with ventilation. Much of the previous air conditioning material — updated where necessary — has been moved to the first part of this chapter; there are some topics that are also relevant to Chapter 2 — Ventilation and Ductwork — and some duplication may be found. The overall purpose of the chapter is to provide detailed guidance for those involved in the design and specification of air conditioning systems. With any project, there will be numerous alternatives at every stage, and the approach takes the reader through the options, describing them and highlighting advantages and disadvantages.
Chilled ceiling types: New Guide B has numerous diagrams such as this one on chilled ceilings to aid understanding. Following an overview that highlights essential environmental considerations and whole-life cost, there is a general introduction to the air conditioning section. The approach is to look first at strategic considerations. This prompts the main questions to be asked and information about each topic is provided. Getting conditioned air to where it is needed leads into room air movement phenomena, in association with various strategies, such as the use of ceiling or floor-height space to duct or distribute cooled air as required.
The physics principles do not change and this material is drawn from the previous Guide B edition. The distinction between air conditioning and comfort cooling is also explained. Where natural ventilation can satisfy part of the requirement — termed mixed mode — detailed strategies and provisions for these systems are given. A strategy to be adopted for cooling and dehumidifying the local air supply is the next major step for the designer. Potential candidates include a centralised scheme, comprising a water-based or hydronic system, where water is chilled in a central plant for distribution around the building or an air-based scheme, where the air to be supplied is temperature — and maybe humidity — controlled centrally and ducted to local areas.
Localised systems generally use the refrigerant itself as the distribution agent and these are termed direct expansion systems. More detail on system types is provided in the refrigeration section where the pros and cons of all these cooling methods are discussed.
An alternative — where local conditions permit — is a ground air cooling system that takes outside air through a ground heat exchange process to remove heat before treatment. New material covering use of the vapour compression cycle for heating has been added, with a description of reversible systems and unitary heat pumps, both ground and air source.
Finally, the air conditioning equipment section deals with specific items associated with processing air such as: intake and discharge points; heat recovery devices; humidifiers; fans; and air flow control. Refrigeration, in the context of this chapter, deals with the cooling and heat rejection equipment necessary to provide the cooling that air conditioning requires.
It has been comprehensively revised to take account of developments in the intervening years, in particular to incorporate guidance on health and safety issues, new regulations, and updated refrigerant information.
Content has been added where there is new information and experience, wording has been clarified where necessary, and sections that are now less relevant have been judiciously pruned. With the declining importance of printed literature, the new version has reverted to having separate chapters available in both printed and downloadable versions, with one exception — a new, online only, chapter B0 Applications and Activities: HVAC strategies for common building types.
Member contributions make up much of the content and we hope to draw on the wider experience of readers to boost its value, especially by adding guidance for applications for which we were lacking good, recent knowledge. Detailed information on HVAC system characteristics, design and selection, and on generic issues, such as acoustic and vibration control, is found in the later chapters, which retain the structure of the previous edition:. The level of detail varies; where comprehensive guidance from CIBSE or other sources is available, Guide B is relatively brief and refers to these sources.
This is the case, for example, for low carbon systems such as heat pumps, solar thermal water heating and combined heat and power. On-site energy generation such as wind power and photovoltaics are not covered.
Information on energy efficiency and sustainability can, of course, be found in Guides F and L. This requires national building energy regulations to be based on calculations integrating the impact of the building envelope and the building services systems, formalising what is already recognised as good design practice.
In addition, the use of voluntary energy efficiency and sustainability indicators has increased. These changes have influenced content, but the emphasis remains on system selection and design.
Regulatory requirements are not described in detail — information varies between jurisdictions and is liable to change more rapidly than the guide can be updated.
Instead, the existence of regulations is signposted and their general scope explained. The introduction emphasises the environmental considerations that should be examined at an early stage, including energy efficiency. No longer is it sufficient to satisfy the cooling demand; it must be done in an energy efficient way, and the means of achieving this are to be found here.
It is not practical in this review to list all the possibilities, but attention is drawn to new developments, in particular the use of carbon dioxide as a refrigerant, both directly and in the form of a secondary coolant. Cooling pipework in sub-floor. Variable refrigerant flow VRF systems, whose flexibility has stimulated growing demand, are given more coverage. Novel methods — such as adsorption and magnetic refrigeration — are included, although readers should consult references for up-to-date information about commercial adoption.
This guide will give designers a good insight into possibilities that may be unfamiliar, and is backed up by an extensive list of references. Skip to content. Detailed information on HVAC system characteristics, design and selection, and on generic issues, such as acoustic and vibration control, is found in the later chapters, which retain the structure of the previous edition: B1: Heating , including hot water systems and a new annex on hydronic systems, also applicable to chilled water systems B2: Ventilation , including ductwork B3: Air conditioning and refrigeration B4: Noise and vibration control for building services systems.
Cooling Regulations. Maintaining thermal comfort in a changing climate. Zero-GWP cooling using the barocaloric effect. Using water as a refrigerant in a commercial chiller.
CIBSE Guide B: Heating, Ventilating, Air Conditioning and Refrigeration
A n ew edition of Guide B Heating, Ventilating, Air Conditioning and Refrigeration has been in preparation for some time and is about to be published, replacing the previous version. For more than 75 years, it has evolved in content and form, but always with the objective of providing an overview of guidance to good practice in the selection and design of HVAC systems. The air conditioning and refrigeration section features a decision tree to help designers select systems. Chapter 3 of the new guide brings together the air conditioning and refrigeration sections. Previously air conditioning was partnered with ventilation.
GVBI/16 CIBSE Guide B: Combined Index to Chapters B0 to B4 2016
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Guide B essentials – air conditioning and refrigeration
Log In. Note: A reprint of Guide B3 is in preparation and will be available soon. Although the text in the original version is correct, the reprint inserts a number of missing paragraph numbers and corrects the title on the front cover, where "air conditioning" and "refrigeration" were in reversed sequence. The corrected pdf is now available.